Dimmit County
Texas — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 36th
Dimmit County faces very low composite natural disaster risk (NRI Risk Index score 35.9, 36th national percentile), driven primarily by heat wave and drought exposure. Expected annual loss across all 18 hazard types is $6M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Heat Wave | Medium | 7.05 / yr | $3M |
| Drought | Medium | 105.87 / yr | $537K |
| Hurricane | Low | 0.04 / yr | $137K |
| Wildfire | Very Low | 0.00 / yr | $34K |
| Cold Wave | Low | 0.37 / yr | $551K |
| Lightning | Low | 34.94 / yr | $87K |
| Tornado | Low | 0.10 / yr | $250K |
| Ice Storm | Very Low | 0.06 / yr | $14K |
| Hail | Very Low | 0.79 / yr | $46K |
| Riverine Flood | Very Low | 1.71 / yr | $1M |
| Winter Weather | Very Low | 1.05 / yr | $6K |
| Earthquake | Very Low | 0.00 / yr | $5K |
| Strong Wind | Very Low | 0.24 / yr | $24K |
| Landslide | Very Low | 0.11 / yr | $5 |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Dimmit County?
Dimmit County has a composite FEMA National Risk Index score of 35.9 out of 100, placing it in the Very Low category and the 36th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Dimmit County?
The three highest-rated hazards are Heat Wave (Medium, $3M EAL), Drought (Medium, $537K EAL), Hurricane (Low, $137K EAL). These account for most of the county's expected annual losses.
How does Dimmit County compare to other Texas counties?
Dimmit County ranks #156 of 254 Texas counties for overall natural disaster risk, with a very low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Dimmit County's $6M EAL is a statistical average, not a guarantee for any specific year or address.